It's so adorable! They have the same birthday, November 2. But Katelyn is a year older.
Screwed by the Network: Nickelodeon's ratings during the end of 2011 were declining, pulling this show's ratings down because of their inconsistent scheduling. Fans were expecting the third season to be their final season; it was a surprise when it was renewed for a fourth season.
There is a perception that Nickelodeon is neglecting the show and the band to focus on One Direction, angering both BTR fans and One Direction fans. Although the Nick-1D relationship never really went anywhere, BTR still was on the losing side because the British boy band would go on to become far more popular than their American counterparts.
What Could Have Been/The Other Marty/The Pete Best: Kendall wasn't originally a character in the show, instead another character Curt, played by Curt Hansen (who would later go on to play a parody of Zac Efron on the show, Dak Zevon), was the lead singer and protagonist of the show. Hansen only appeared as "Curt" in the unaired pilot. Then he was later replaced by Kendall Schmidt, because he (Hansen) sounded too much like James, looked a bit too old, and didn't "click" as well with the other three, so the pilot was reshot.